- Choosing an Optimal Server for VM Initial Placement, Migrate, and Resume
- Accepting Optimization Recommendations
Workload Balancing provides recommendations about ways you can migrate virtual machines to optimize your environment. Optimization recommendations appear in the WLB tab in XenCenter.
This illustration shows a screen capture of the Optimization Recommendations list, which appears on the WLB tab. The Reason column displays the purpose of the recommendation. The Operation column displays the behavior change suggested for that optimization recommendation. This screen capture shows an optimization recommendation for a virtual machine, HA-prot-VM-7, and a host, host17.domain4.bedford4.ctx4.
Optimization recommendations are based on the:
The optimization recommendations display the name of the virtual machine that Workload Balancing recommends relocating, the host it currently resides on, and the host Workload Balancing recommends as the machine's new location. The optimization recommendations also display the reason Workload Balancing recommends moving the virtual machine (for example, "CPU" to improve CPU utilization).
After you accept an optimization recommendation, XenServer relocates all virtual machines listed as recommended for optimization.
After you click Apply Recommendations, you can click Notifications and then Events tab to display the progress of the virtual machine migration.
If you have Workload Balancing and the XenServer High Availability feature enabled in the same pool, it is helpful to understand how the two features interact. Workload Balancing is designed not to interfere with High Availability. If there is a conflict between a Workload Balancing recommendation and a High Availability setting, the High Availability setting always takes precedence. In practice, this means: